REGENERATOR FOR AN OPTICAL TRANSMISSION SYSTEM

摘要

REGENERATOR FOR AN OPTICAL TRANSMISSION SYSTEM The present invention relates to an optical pulse stream regenerator. The regenerator comprises an optical receiver which is responsive to an incident optical data pulse stream for producing an electrical data pulse stream representing the incident optical data pulse stream. The optical receiver includes an amplifier stage providing variable gain in response to a first range of an automatic gain control signal and having an avalanche photodiode providing variable gain in response to a second range of the automatic gain control signal thereby maintaining the electrical data pulses at substantially the same magnitude regardless of fluctuations in the magnitude of pulses in the incident optical data pulse stream. A unit is provided which is responsive to the electrical data pulse stream from the optical receiver for recovering a clock pulse stream which is syncronized with the incident optical data pulse stream. A unit is provided which is responsive to the clock pulse stream and to the electrical data pulse stream from the optical receiver for regenerating an electrical data pulse stream representing the incident optical data pulse stream. An optical transmitter is provided which is responsive to the regenerated electrical data pulse stream for regenerating an optical output data pulse stream which represents the incident optical data pulse stream.